Device for surfacing grindstones



Oct. 13, 1931. K. JUNG DEVICE FOR SURFACING GRINDSTONES Filed Jan. 4, 1929 'Delais-ii] i UNiTEo .lsArATasPArl-:NI ori-ica kann JUNG, or aannam, aannam mwIcE ron-smacme cnINDsToNEs AAmllatioll. 11ml January 4, .1929, Serial No.

This invention relates to a grindstone surfacin device intended for grindstones or grin disks of the kind in which the circumferential surface,in axial direction, is

composed of a' straight line and of a curved line joining directly said stra-ight one. -The of the invention is to accommodate Vthe movement or movements of the surfac- Y ing tool accurately to the profile of the grind- 110 ing disk, so thatafter the surfacing of the -im vention; Fig. 2 is a section in the plane 2`2 of Fig. 1 taken in the direction of the arrow A,

and Fig. 3 is a section in the plane 3-3 ofY F' 1 taken in the direction of the arrow B. the drawings, 4 (Figs. 1 andl 2) is a diamond which 1s the surfacing member proper.` It is adjustablyxmounted'n known.

manner in a transverse member 5 supported in a casing 8 forming the front portion of av slide 15. The member or tool carrier 5 is supported on pivots or between centres 6 and 7 m such av manner that it can be turned or rocked thereon. The top of the casing 8 is preferably closed by a hood 9 in order to prevent `the entrance of dust. The member 5 is connected by a link 11 and by pivots 10 and 12 (Figs. 1 and 3) with a slide 14 longitudinally shiftable' in said slide 15; the two slides are connected with one another by springs 16 located in recesses of the slide 15 and connected by pins 17 with it, whereas a. pin 18 passing through the slide 14 is connected with-the other ends of said springs.

The slide 15 is supported in a stationar casing 19 and longitudinally shiftable therein. From the slide 15 extend upwardly through slots 22 two bolts 2O and 21, the projecting portions of whichare surrounded with springs 24 bearing upon a plate 23 slidably supported on the casing 19. The springs draw the bolts upwardly whereby the slide 15 into 330,872, and in Germany February 89, 1928'.

which their'lower ends are screwed is held closely against the upper wallof said casing. Behind thejslide 14 a threaded spindle 25 is provided and bears against therear end of said slide, or engages a rear boreo f it with a 55 pivot-like projection, as is the case-in the constructional form shown by way of example. The slide 14 and said pivot are connected with one another by means of a key 26, as shown. The spindle 25is.supported 1n a stationary 60 -nut 27 located inthe rear end of the casing 19. The nut can berotated and, thus, the spindle 25 be axially moved forwards or backwards by means of a hand-wheel or handcrank 28, the spindle 25 being prevented from 65 turning in consequence of its connection with the slide 14 by means of the pin 26.

The slide 15 is provided with an abutment member 29 which consists, in the example shown, of a pin inserted into the front end of said slide. The pin 29 co-operateswith another pin or abutment member 30 arranged adjustably in the front face of the casing 19; the pin 30 can be fixed in its adjusted position by a threaded pin or screw 31.

The manner of operation of the device is as follows:

The grinding disk to be surfaced (indicated by dotted lines at 32 in Fig. 1) has a cylindrical. circumferential surface and" a .A rounded 8@ edge at one of its faces. After the device has been properly adjusted with respect to the grinding disk, the crank or disk 28 is rotated so that the spindle 25 is pressed against the slidev 14 and shoves it forwardly, but as this 85 slide is connected with the other slide (15) by the springs 16 also this other slide is moved forwardly.

The casing 8 in which the tool carrier 5 is housed and which forms thefront portion of the slide 15, as has already been stated, is preferably made integral with this slide. When y this slide is moved forwards by the means just stated, also the casing 8 and with it the tool carrier 5 are moved forwards and, therefore, ,95 the cylindrical circumferential main portion of the grinding disk is surfaced by means of the diamond 4. The diamond is moved forward by the means described until the entire main circumferential surface of the grinding 10.

. disk has been surfaced, when the parts will forward within the slide .,15- and against the action of the springs 16. This motion is transmittedto th'tool carrier 5 by `the medium of the link 11 so that the tool carrier and the tool are turned on the centres 6 and 7 whereby, 15 the operating end of the tool is caused to move in a circular path corresponding to the rounded edge of the grindingl disk which is, thus, surfaced, as desired. T e curved path of the operating portion of thediamond is a direct 'succession of the `former/rectilineai' path of the same. The rounded .edge/of the grinding disk is that on the left in Fig. 1..

I wish it to be understood that I do not limit myself to all details of the device shown in .g5 the drawings merely by way of example.

Thus, for instance, the slides, instead of being guided by prismatic members, and by feathers 1n grooves, may be guided by dove-tailed members, and instead of the springs 'wei hts so may be used as substitutes for them. 4urthermore, the device can be designed also for the surfacing of grinding disks having one. of its edges conically shaped. In such a case. nothing else is necessary but to arrange the 85 axial direction of the device in a corresponding an le with respect to the axis of the grinding dis j I claim Y 1. A device for the surfacing of grindo stones, the outer contour line of Awhich consists of a circular curve joining a straight line, said device comprising, in combination, a surfacing tool, a rocking member toy which it is attached, a casing in which said rockin member is supported, a slide with which sai casing is connected, a second slide shiftable with respect to the first-mentioned slide; elastic means connecting the two slides with` one another, a link connecting said second slide with said rocking member, a casing in which said slides move, and means for moving both slides and being common' to them, said arrangement and combination of parts lfieinlg adapted to operate substantially as set 2. A device for the surfacing of rindstones, the outer contour lineof whic consists of a circular curve joining a straight line, said device comprisingin combination, a surfacing tool, a rocking member vto which it is attached, a casing in which said rockin member is suppoifted,a. slide with whic J said casing is connecteda second, slide shiftable-with respect to` the first-mentioned slide and arranged -`in it; elastic means connect- 4ranged as to be adapted v'to contact with one abutment member arranged on said Vfirst League ing the slides with one'an'other; a casing in which said slides move; means for moving both slides; abutment members provided in said-casing and on one ofsaid slides and so aranother, said arrangement and combination ofparts being adapted to operate substantially asset forth.

3. A device for the surfacing of rindstones, the outer contour line of whic consists of a circular curve jfoinng`a straight' line, said device comprising, in combination, a surfacing tool', aroc -member to which it is attached, a slide wit which said mem-- ber is connected, a second slide shiftable with respect to thel first-mentioned slide; elastic means connecting the two slides with one another, a link connecting said second slide with said rocking member, a casing in which said slides move and means for movin both slides and being common to them, said arlrangement land combination .of parts being adapted to operate substantially as set forth.

4. A device for the surfacing of indstones, the outer contour line'of whic .consists of a circular curve joining a straight line, said device comprising, in combination, a surfacing tool, a rockin member to which it is attached, a slide -wit which said member is connected, a second slide shiftable with respect to the first-mentioned slide;` elastic means connecting'the two slides with one another, a link connecting said second slide with said rocking member, a casing in which said slides move, means for moving both slides and being common ,to them and an abutment member arran ed in said casing and co-o eratingwith said slide and limit- Iing its s iding movement, said arrangement and combination of parts being adapted to operate substantially as setforth.

A5. A device for the surfacin of indstones, the outer contour line vo whic consists of a circular curve joining a straight line, said device comprising, in combination, 11o a surfacing tool, a rockin member to which it isy attached, aslide wit which said member is connected, a second slide shiftable with respect to the first-mentioned slide; elastic means connecting the two slides with one another, a link connecting said second slide with said rocking member, a casing in j which said slides move, means for moving both slides andbeing common to them, an

12o slide and another vabutment member arranged on said casing and co-operating with said first mentioned abutment and limitingy I the slidin movement of the first mentione slide, sai arrangement and combination of parts beingl adapted to operate substantially as set fort In testimony whereof I aiix my signature.

KARL JUNG.v .1w 

